#include <54func.h>
int main()
{
    printf("You can see me!\n");
    printf("pid = %d\n",getpid());
    execl("add",//add是exe的路径
          "./add","3","4",//./add是命令行参数的一部分
          NULL);// 额外补充一个NULL，这个是必须要的
    printf("You can't see me!\n");
    return 0;
}
